826704-B21 HPE Riser Card

High-Density PCIe GPU Expansion Accessory with Active Signal Conditioning using the 826704-B21

The 826704-B21 is an HPE server accessory PCIe riser engineered to add accelerator-class expansion into compatible chassis designs where GPU placement and airflow are tightly controlled. Designed for RHS riser bay integration, it enables additional Full Height Full Length PCIe connectivity for GPU and accelerator deployments while preserving a serviceable, repeatable internal layout across standardized racks.

Architecturally, the 826704-B21 extends the host platform’s PCIe fabric through an active riser design that conditions high-speed signals to maintain link stability under demanding lane rates and trace lengths. With 2 x PCIe x16 host connectors delivering x16 lanes each, it supports bandwidth-sensitive workloads that rely on consistent PCIe behavior for GPU direct memory access, peer-to-peer traffic, and deterministic latency. This makes the 826704-B21 a practical element in systems that balance CPU-to-GPU topology, expansion density, and storage-plus-accelerator coexistence in the same node.

Why Choose the 826704-B21?

The 826704-B21 provides a controlled, vendor-validated method to scale accelerator I/O without compromising enterprise reliability. By using an active riser to preserve signal integrity, it improves deployment confidence for dense GPU configurations and supports consistent performance at scale. The 826704-B21 is well suited for standardized builds where slot availability, service access, and repeatable cabling paths are critical to operational efficiency.

HPE designs accessories such as the 826704-B21 to align with platform-specific mechanical, thermal, and electrical constraints, ensuring predictable integration with modern data centre standards. This approach supports lifecycle-managed environments where component compatibility, maintainability, and validated configurations are as important as raw expandability.

Key Applications:

• GPU-accelerated AI inference nodes
• HPC compute acceleration
• VDI graphics acceleration
• Media transcoding and rendering

At Happyware - Server Hardware you benefit from 24/7 Customer Service to support rapid configuration checks and ordering for 826704-B21-based accelerator builds, and you can secure an Extended Warranty up to 6 years to protect long-lived data centre deployments.